Welding rod



WELDING ROD 'ziginal- Filed Ausr @Escasa 'e'. sauswmzi gyms MmmmPatented Dec. 21, 1937 l 2,102,813 y WELDING aon George 1'. Southgate,Forest Hills, and James G. Nicolson, Niagara Falls, N. Y., assgnors, bymesne assignments, to Union Carbide and Carbon Company, a corporation ofNew York Original application August 14, 1934, Serial No.

739,748. Divided and this application September 12, ,1936, Serial No.100,418. In Canada August 13, 1935 11 Claims.

The present invention relates to welding rods vor wires, and moreparticularly to partially coated welding rods or wires to be used asfiller metal in fusion welding by the Oxy-acetylene, electric arc,orother welding processes. This application is a division of copndingapplication Serial No. 739,748, filed August 14, 1934.

Welding rods or wires have been proposed heretofore which are ofsubstantially elliptical or dumb-bell shape in transverse section. Ithas also been proposed to apply an oxide or other coating upon circularwelding rods, or upon the An object of this invention is to provide aweiding Wire shaped in such a manner as to enable an eiiicientelectrically conductive metal-to-metal contact between a portion of thesurface of the wire and an electrically conductive member or element ofan automatic or other Welding machine. Another object of this inventionis to provide an improved welding rod having portions which are coatedwith flux and portions which are bare and cooperate with mechanism toguide such rod to the welding point...

'I'he above and other objects of the invention are accomplished, inaccordance with this invention, by providing a "welding rod. in whichtwo coated and transversely curved longitudinally continuous surfaceportions are spaced by two bare longitudinally continuous surfaceportions.

The novel and characteristic features of our invention areset forth withparticularity in the appended claims. The invention itself, however,together with additional objects and advantages thereof, may be betterunderstood from the following description of one form of apparatus withwhich a Welding rod embodying the principles of the present inventionmay be produced.

In the drawing, wherein like reference characters indicate correspondingparts in the different views:

Fig. l schematically represents an apparatus for simultaneously coating,shaping and drying` any desired type of weld wire;

Fig. 2 represents a cross-section along line 2-2 of the weld Wire shownin Fig. l, and

Fig. 3 represents a cross-section of a modied type of weld wire.

'Ihe apparatus shown in the drawing comprises upper and lower wire reelsI and II respectively, preferably of metal, and intermediate these reelsa dipping trough I2 and a pair of cylindrical flattening rolls I4 drivenin any conventional manner. The wire I3 is unwound from the lower reel II, passed upwardly through the gland or stuiiing boXS of dipping orcoating tank I2 and is wound upon the upper reel I0 which is also drivenby suitable means, such as a belted connection to the driving means (notshown) provided for the iiattening rolls I4. Preferably, there `is somedegree of slippage between the rate of drive of the rolls and that ofthe upper reel to compensate for the changing periphery of the coil ofwire as it piles up on the reel. A source of electric current isprovided at I5 which is connected into a circuit including switch I6,conductors I'l, roll I4, wire I3, and contact roller I3. This circuit,when closed by switch I6, causes electric current to ow through theportion of wire I3 which at any given instant is comprised between rollsI4 and contact roller I8, of a magnitude suicient to complete the dryingbefore each increment of the wire reaches the upper reel I0. The upperor auxiliary rolls I81may serve not only for the upper conductiveconnection but. also, through suitable mechanism of familiar type, forguiding the wire into a neat lay upon the reel, thus forming a compactcoll thereon. The wire may be left on the upper reel I0 forlshipment anduse, or the reel may be made collapsible and the coil of wireaccumulated thereupon removed and prepared for shipment as by wrappingwith paper. A pair of soft pads 20 are arranged above the dipping orcoating vat I2 and below the attening rolls I4, one on each side of thewire I3.

These pads are adjusted and disposed to Wipe oil` fromthe lateralperipheral portions of the wire about to -be attened, the coating liquidwhich would otherwise become deposited upon the rolls.

To supplement these lateral wire-wipers there are provided a pair ofroll-wipers 22 pressing against the periphery of the two flatteningrolls, in order to remove any coating liquid which might escape thewire-wipers in the lateral zones of the flattening.

The operation of the ,apparatus for the simulrtaneous localized coating,attening and drying of weld wire is as follows;

The apparatus is started by starting the rotation of the rolls I4 in thedirection shown by the arrows. A wire, such as wire I3, having beenpreviously wound upon reel I I, is partly unwound from the reel, passedthrough the gland 9 of the coating tank I2 where it is covered withcoating material 21; then it is passed through the pads 20, and isbrought into engagement rst with thefiattening rolls I 4, and then withthe contact rollers I8. At this moment switch I6 is closed, whereby theportion of the wire between rolls I4 and I8 is heated and dried. Thewire I 3 is then broughtl into engagement with rotating reel I0 andwound thereupon.

The apparatus described above may be used for coating of welding wirewith various types of coating material, including oxides, salts, metalpowders, fibrous materials, organic substances, mineral or other powderssuspended or dissolved in water, alcohol, ethylene dichloride, carbontetrachloride, and/or any other sufciently volatile liquid. The coatingbath should preferably be made up as a rather viscous slurry, and maycontain in solution or suspension, glue, resins, or other cementitiousmaterials which when dried will impart strong bonding property to thecoating. The coating and drying may proceed at any desired rapid rate,such as 60 ft. per minute, for example. The operation of the apparatusmay be effected in multiple, i. e. with a number of wires drawn throughthe same bath and rolls, but taken from or carried to individual supplyreels and receiving reels, and provided with electric heating circuitsconnected in parallel.

The product made in accordance with this invention has certainsubstantial advantages over welding wire previously made. The elongatedshape of the wire lends itself to greater visibility to the operator,especially in welding within deep grooves, and thus assists him inholding the arc (in electric Welding), controlling the puddle, andperfecting the quality of the deposit. The bare at surfaces of the wireare particularly useful for cooperating with guiding and feedingmechanism in propelling the wire to the welding point, and for thermore,such surfaces are helpful even in man- J ual welding in giving quickconnection by clamping with ordinary pliers.

Fig. 2 represents a cross-section of a flattened wire produced by usingsmooth cylindrical shaping rolls. The coating material is shown at 2 andthe flattened contact-providing surfaces at 28. A preferred weld wire ofthis type is one in iwhich the major axis bears a relation to the minoraxis of about l to Vg.

By using a pair of shaping rolls having a profiled periphery it ispossible to obtain a weld wire in which the bare contact-providingsurfacecarries one or two projections or` ridges such as shown in Fig.3. This shape of the contact suring through the bare portions of about 1to 1/2.

aioaeia face has the advantage of providing guiding contact ridges 3lfor accurately aligning the wire when passing it through the weldinghead of an automatic welding machine. Of even greater importance, theseridges serve as improved means of electric contact as the wire passesthrough an automatic electric-welding head, in that they may be pressedtightly without injury to thecoating, and may be operated at highcurrentl density.

We claim:

1. A welding wire comprising two transversely curved longitudinallycontinuous surface portions separated by two 'longitudinally continuousportions, said rst mentioned surface portions being coated and said lastmentioned portions being bare.

2. A welding wire as defined in claim 1 in which the transverse axisperpendicular to the coated surface portions bears a relation to theaxis pass- 3. A welding wire as dened in claim 1 in which at least oneof the bare surface portions has a bare projection thereon extending theentire length of the wire.

A 4. A welding wire as defined in claim 1 in which at least one of thebare surface portions is so shaped as to provide a more effectivecontacting and guiding portion thereon.

5. A welding wire having a at bare surface and a coated surface, bothsurfaces extending lengthwise of the wire parallel to its axis, and saidfiat surface having a longitudinal projection thereon.

6. A welding wire having a bare surface and a coated surface, bothsurfaces extending lengthwise of the wire, and a ridge coextensive withand adjoining said bare surface.

'7. A welding wire having two separate fiat bare surfaces and twoseparate coated surfaces, said surfaces extending lengthwise of the wireparallel to its axis and each coated surface being disposedbetween saidbare surfaces.

8. A welding wire as claimed in claim 7, in-

cluding ridges severally coextensive with said bare surfaces, measuredperpendicular to said axis.

10. A welding rod having ux coated surfaces and flat bare surfaces, allsuch surfaces extending lengthwise of therod, and each flux coatedsurface being disposed between bare surfaces.

1l. A welding rod having flux coatedsurfaces and fiat bare surfaces, allsuch surfaces extending lengthwise of the rod, and each ux coated.surface being curved transversely of the longitudinal axis of the rodand disposed between ybare surfaces. .I c 4 GEORGE T. SOUTHGATE. JAMESG. NICOLSON; `4 l CERTIFICATE OE CORRECTION.

Patent No., 2,102,815. December 2l, l957 GEORGE T. SOUTHGATE, ET

lt is hereby certified that the name of the assignee in the abovenumbered patent was erroneously described and specified as "UnionCarbide and Carbon Company whereas said name should have been describedand specified as Union Carbide and Carbon Corporation, a corporation ofNew York, as shown by the record of assignments in this office; and thatthe said Letters Patent should be re ad with this correction thereinthat the same may conform to the record of the case in the PatentOffice.

Signed and sealed this 15th day of February, Aa D. 1958.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patentsu CERTIFICATE 0F CORRECTION. PatentNoz 2,102,815, December 21, 195711 GEORGE T. SOUTHGATE, ET ALI.

It is hereby certified that the name of the assignee in the abovenumbered patent was erroneously described and specified as Union Carbideand Carbon Company" Whereas said name should have been described andspecified as Union Carbide and Carbon Corporation, a corpo-ration of NewYork, as shown by the record of assignments in this office; and that thesaid Letters Patent should be re ad with this correction therein thatthe same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th day of February, A D. 1958.

Henry Van Arsdale (Seal) Acting Commissioner of Patents,

